例句與造句

1. "There are only two real barriers : cost and safety, " said Keith Calhoun-Senghor, director of the Commerce Department's Office of Space Commercialization.
2. The " Country " section pairs portraits of Louisiana sugar cane cutters by Keith Calhoun and Chandra McCormick with Eli Reed's shots of Rwandan children in a refugee camp.
3. "The civilian, non-military uses of this technology will dwarf the military applications over time, " says Keith Calhoun-Senghor, director of the Commerce Department's office of air and space commercialization.
4. It's difficult to find keith calhoun in a sentence. 用keith calhoun造句挺難的